After being given video evidence of a janitor rubbing his junk on water bottles that he opened, rubbed himself on, and then recapped and replaced employee water bottles, upper management waited to tell employees it was happening. So far 13 people have tested positive for herpes.
She literally sent a video to upper management and said she was going to inform the building management and the other tenants of the building to give them a heads up. Management asked her not to do that, They would handle it and notify the other tenants of the building.
She got video evidence of him doing it again, the very next day, and management waited nearly a week after she sent the second video before they made any sort of announcement.
If you feel like there is a safety situation that your coworkers should know about, tell them. You can't trust the people at the top to do the right thing. Even at a damn law firm.